Effect of Poly(acrylic acid) and Polarization on the Controlled Crystallization of Calcium Carbonate on Single-Phase Calcite Substrates

2013 ◽  
Vol 13 (7) ◽  
pp. 2928-2937 ◽  
Author(s):  
Norio Wada ◽  
Naohiro Horiuchi ◽  
Miho Nakamura ◽  
Tetsuo Hiyama ◽  
Akiko Nagai ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Acrylic Acid ◽  
Single Phase ◽  
Controlled Crystallization ◽  
Poly Acrylic Acid

Preparation of amorphous calcium carbonate nanoparticles from impure dolomitic marble with the aid of poly(acrylic acid) as a stabilizer

2014 ◽  
Vol 25 (2) ◽  
pp. 591-598 ◽  
Author(s):  
M.M.M.G.P.G. Mantilaka ◽  
R.M.G. Rajapakse ◽  
D.G.G.P. Karunaratne ◽  
H.M.T.G.A. Pitawala
Keyword(s):  
Calcium Carbonate ◽  
Acrylic Acid ◽  
Amorphous Calcium Carbonate ◽  
Dolomitic Marble ◽  
Poly Acrylic Acid

Crystallization of vaterite and aragonite on chitin whiskers

2021 ◽  
Vol 16 (2) ◽  
pp. 23-30
Author(s):  
Michael Ikpi Ofem
Keyword(s):  
Calcium Carbonate ◽  
Acrylic Acid ◽  
Room Temperature ◽  
Spherical Shape ◽  
Time Frame ◽  
Sem Images ◽  
Volume Fractions ◽  
Chitin Whiskers ◽  
Calcium Carbonate Polymorphs ◽  
Poly Acrylic Acid

The need for the possibility of producing calcium carbonate crystals by the evaporation method within five minutes and the growth of different calcium carbonate polymorphs on chitin whiskers within the same time frame at room temperature necessitated these report. Chitin whiskers (CHWs) were used as insoluble substrates, while poly (acrylic) acid (PAA) is used as soluble additive. The crystals were grown in chitin whiskers, Poly (acrylic) acid and CHW/PAA composites. The volume fractions for aragonite, vaterite, and calcite are 0.10, 0.25, and 0.65, respectively, in the absence of chitin whiskers or Poly (acrylic) acid. Calcite and aragonite volume fractions decrease in favour of vaterite when PAA and or CHWs were added. SEM images in the absence of CHWs and PAA shows rhombohedral calcites that display steady and step like plane appearances with an average edge of between 1.3 and 1.4 μm. In the presence of only CHWs, the SEM images show a mixture of ellipsoidal and spherical shape vaterites. The spherical vaterites have smooth, rough, and some irregular surfaces. Rod-like aragonite polymorphs were seen when only PAA was used as the template. In the presence of both PAA and CHWs, the rhombohedral shape showed roughness with irregular faces. Keywords: Chitin whisker, Calcium carbonate, Calcium, vaterite aragonite, Polymorph, Mole fraction

scholarly journals Synthesis of nanoporous calcium carbonate spheres using double hydrophilic block copolymer poly(acrylic acid-b-N-isopropylacrylamide)

2018 ◽  
Vol 230 ◽  
pp. 143-147 ◽  
Author(s):  
Sudhina Guragain ◽  
Nagy L. Torad ◽  
Yousef Gamaan Alghamdi ◽  
Abdulmohsen Ali Alshehri ◽  
Jeonghun Kim ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Block Copolymer ◽  
Acrylic Acid ◽  
Copolymer Poly ◽  
Poly Acrylic Acid

Nanosized Amorphous Calcium Carbonate Stabilized by Poly(ethylene oxide)-b-poly(acrylic acid) Block Copolymers

Langmuir ◽  
2006 ◽  
Vol 22 (4) ◽  
pp. 1875-1879 ◽  
Author(s):  
Baptiste Guillemet ◽  
Michael Faatz ◽  
Franziska Gröhn ◽  
Gerhard Wegner ◽  
Yves Gnanou
Keyword(s):  
Calcium Carbonate ◽  
Block Copolymers ◽  
Acrylic Acid ◽  
Ethylene Oxide ◽  
Amorphous Calcium Carbonate ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Poly Acrylic Acid

scholarly journals Inhibition of homogenous formation of calcium carbonate by poly (acrylic acid). The effect of molar mass and end-group functionality

Desalination ◽  
2014 ◽  
Vol 338 ◽  
pp. 93-105 ◽  
Author(s):  
Ali A. Al-Hamzah ◽  
Christopher P. East ◽  
William O.S. Doherty ◽  
Christopher M. Fellows
Keyword(s):  
Calcium Carbonate ◽  
Acrylic Acid ◽  
Molar Mass ◽  
End Group ◽  
Poly Acrylic Acid

scholarly journals The Combined Effects of Sr(II) and Poly(Acrylic Acid) on the Morphology of Calcite

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3339 ◽  
Author(s):  
Hak Yeong Kim ◽  
Taewook Yang ◽  
Wansoo Huh ◽  
Young-Je Kwark ◽  
Yunsang Lee ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Acrylic Acid ◽  
Combined Effects ◽  
Magnesium Ions ◽  
Ethylene Imine ◽  
Strontium Ions ◽  
Poly Ethylene ◽  
Poly Acrylic Acid

Biomineralization of calcium carbonate has interesting characteristics of intricate morphology formation with controlled crystal polymorphs. In particular, modification of calcite morphology with diverse additives has been the focus of many biomimetic and bioinspired studies. The possible role of strontium ions in enhancing the morphology-modifying ability of macromolecules was investigated. In the present study, concentrations of strontium ions were comparable to that in seawater, and anionic poly(acrylic acid) and cationic poly(ethylene imine) were used as model macromolecules. When strontium ions were combined with anionic poly(acrylic acid), new types of calcite surfaces, most likely {hk0}, appeared to drastically change the morphology of the crystals, which was not observed with cationic poly(ethylene imine). This behavior of strontium ions was quite similar to that of magnesium ions, which is intriguing because both ions are available from seawater to be utilized during biomineralization.

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